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(No Model.) 2 Sheets-Sheet 1.

H. G. MGLEAN. MACHINE FOR TURNING DYNAMO GOMMUTATORS. No. 429,946 Patented June 10, 1890.

ra ed g9 (No Model.) 2 Sheets-Sheet 2.

H. G. McLEAN. MAGHIN-B FOR TURNING DYNAMO GOMMUTATORS. No. 429,946. Patented'June 10, 1890.

UNITED STATES PATENT OFFICE.

HORACE G. MCLEAN, OF MCPHERSON, KANSAS, ASSIGNOR OF ONE-THIRD TO i EDWARD G. HEGGELUND.

MACHINE FOR TURNING DYNAMO-COMMUTATORS.

SPECIFICATION forming part of Letters Patent No. 429,946, dated June 10, 1890.

Application filed January 18, 1890. Serial No. 337,330. (No model.)

To all whom it may concern: which is secured in said casting E, and oper- Be it known that I, HORACE G. MGLEAN, of ates in the bearings C, as illustrated in Figs McPherson, McPherson county, Kansas, have 1 and 2, on the shaft F, on which is secured invented certain new and useful Improvea suitable crank and handle G, for the purments in Machines for Turning Dynamo-Compose of returning shaft D to its original posi- 55 mutators, of which the following is a full, tion after having taken a out, which may clear, and exact description, reference being he done by revolving shaft D until the feed had to the accompanying drawings, forming operating disks L and K are out of gear.

a part hereof. H is a detent-lever with a flanged projec- IO My invention relates to improvements in a tion h, which operates against the arms k. 60 machine for turning dynamo-commutators; This flange is designed to press against two and it consists in the novel construction and of the arms 70, thus forming a bearing sufliarrangement hereinafter fully set forth and cient to hold handle G in position until the described. finger Z makes its revolution and turns said In the drawings which illustrate my inven- Wheel K. Spring i allows said detent-lever 65 tion, Figure 1 is a front elevation of a de- H to spring outward, allowing wheel K to vice embodying my improvements. Fig. 2 operate. is a top plan View of the same. Fig. 3 is a side M are the segmental dynamo-commutators, elevation. Fig. 4 is a detail perspective of which are secured on the jig N by suitable the feeding device. Fig. 5 is a detail view lugs m, which coincide with lugs m, which 70 showing the position that the disk Loccupies form a part of jig N. in connection with the operating-disk K, and O is a guide, which forms a part of the up- Fig. 6 is a detail in perspective of the detentper platform 13' and serves to guide the castlever H. ing E when moving in either direction by Referring to the drawings by lett-er,Arephaving the traveling guide 6 to operate 75 resents my invention. thereon.

B is a metallic base resting on a suitable a is a fly-wheel, heretofore referred to, sefoundation B. It may, however, rest on a cured on shaft B by suitable nut d. This table, bench, or other suitable platform. wheel may be operated by a belt or by a suit- C are columns cast together with base 13, able handle a. 80 which form bearings for the upper platform I) is a bridge, which forms a part of the B and main shaft D, said shaft D having platform B, on which rests the cutting-tool f. hearings in the columns 0, as illustrated by b is a yoke provided with suitable perfo- C' and C. Said bearings C and C have rations through which bolts 0 pass, said bolts the upper surface slotted, as illustrated in 0' being threaded into the platform l3 for 85 Figs. 2 and 3. These slots are for the purholding said bed in position. pose of keeping the bearings tight by means 6 is a suitable guide or lug secured on cast.- of tangent-screw 0. ing E, as illustrated in Figs. 2 and 4. This E is a metallic cast-ing in which operates has a bearing on the guide 0 and serves to 40 the end of shaft D. Said shaft D passing keep the casting E in position in its operao entirely through casting or, cross-head E, is tion back and forth. provided with a disk L, which is secured'and All dynamocom mutators are subject to held in position by a suitable thumb-nut J, wear when in use, and the friction of the said wheel L being provided with a finger Z, brushes on them causes them to wear off in which operates against the arms 7.: of the such a manner as to leave the surface un- 5 wheel K, thus causing it to turn a short diseven, when they become unfit for use. My tance with each revolution of the fly-wheel a, device is for the purpose of cutting away all feeding the dynamo-segments M to the cutdefects in said commutators, and it is accomting tool or knife f. plished by securing the segmental commuta- 5 F is the feed-screw end of the shaft F, tor on the jig N in the manner illustrated in Ice the accompanying drawings. Then by each revolution of the shaft D the disk L, operating against the disk K, causes the feed-screwF to gradually feed the commutator to the cutting-tool f, thus cutting away all imperfections on said segmental commutator-s and leaving the surface even and in properorder to be replaced on the dynamo. It may be found necessary to pass the commutator across the cutting-tool several times before an even surface is attained; but the operation is the same each time, the feeding process being made automatic by disk L operating against the arms 7; of the wheel K.

Having thus fully described my invention, what I claim as being new, and desire to secure by Letters Patent, is

1. In a machine for turning dynamo-commutators, the main shaft D, the cross-head E, secured to one end of the main shaft and provided with the lug e, the guide 0, on which the lug 9 slides, the disk L on one end of the shaft D, having a finger, the shaft F, having a screw-threaded end F working in a screwhole in the bearing 0, the fingered disk K 011 shaft F, and the crank G, all operating substantially as described.

2. In a machine for turning dynamo-commutators, the main shaft D, mounted on 001- umns C 0, means for turning the shaft, the jig N, 011 which the eommutator-sections are fastened, the cross-head E on one end of the main shaft, having the lug e, the guide 0, on which the lug slides, the disk L on one end of the main shaft, having afinger Z, the shaft F, turning in the cross-head E and having a screw-threaded end F, said end working in a serew-hole in the bearing 0, the fingered disk K on shaft F, and the crank G, all operating substantially as described.

3. The casting or cross-head E, having an opening, a shaft F, working in said opening and provided with a screw end which works in a screw-hole in the bearing C, a fingered disk K, the detent-lever H, secured to the casting E and bearing against the fingers of the disk K, and a spring bearing on the under side of said detent-lever, keeping it in engagement with the fingers 713 of the disk K, substantially as described.

In testimony whereof I affix my signature in presence of two Witnesses.

HORACE G. MCLEAN.

\Vitnesses:

A. A. Hrenon, R. A. BALDERSON. 

